tst_qmenubar fails on Ubuntu

 
  QtQA::App::TestRunner: begin tst_qmenubar: [./tst_qmenubar] [-silent] [-o] [/work/ci/qt/qt5/dev/_artifacts/test-logs/tst_qmenubar-testresults-00.xml,xml] [-o] [-,txt]
  Testing tst_QMenuBar
  FAIL!  : tst_QMenuBar::check_menuPosition() Compared values are not the same
     Actual   (menu.pos())                                              : QPoint(65,35)
     Expected (QPoint(mbItemRect.x(), mbItemRect.top() - menu.height())): QPoint(6,35)
     Loc: [/work/build/qtbase/tests/auto/widgets/widgets/qmenubar/tst_qmenubar.cpp(1063)]
  Totals: 32 passed, 1 failed, 0 skipped, 0 blacklisted
  QtQA::App::TestRunner: test failed, running again to see if it is flaky...
  ********* Start testing of tst_QMenuBar *********

  Totals: 32 passed, 1 failed, 0 skipped, 0 blacklisted
  ********* Finished testing of tst_QMenuBar *********
  QtQA::App::TestRunner: test failure could be reproduced twice consecutively
  QtQA::App::TestRunner: end tst_qmenubar: 3 seconds, exit code 1
  QtQA::App::TestScheduler: tst_qmenubar failed

When I run it separaltely I got following results:

     Actual   (menu.pos())                                              : QPoint(65,91)
     Expected (QPoint(mbItemRect.x(), mbItemRect.top() - menu.height())): QPoint(16,91)